Foster often wrong, grabbing maiden (6)
I believe the answer is:
foment
'foster' is the definition.
(thesaurus)
'often wrong grabbing maiden' is the wordplay.
'wrong' indicates an anagram.
'grabbing' is an insertion indicator.
'maiden' becomes 'm' (cricket abbreviation).
'often' with letters rearranged gives 'foent'.
'foent' going around 'm' is 'FOMENT'.
(Other definitions for foment that I've seen before include "Arouse or stimulate, say trouble" , "Arouse or stimulate, maybe trouble" , "produce a stir" , "Stir up or stimulate, say trouble" , "Arouse or stimulate, perhaps trouble" .)